The Trocadero Ballroom was quite real
Hi -
In the current summary of this film, the Trocadero is referred to as a "fictional" nightclub.
Actually, The Trocadero Ballroom on the Sunset Strip area of Los Angeles was quite famous during the 1930's. (For you real movie buffs, as I recall in the early scene on the golf course in "Sunset Boulevard" from 1950, the agent character makes a joke to the William Holden character to the effect about not getting stuck in that Trocadero, Mocambo rut.)
- TWR